JP2873995B2 - Combustion equipment with exhaust system construction abnormality alarm - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust system construction error caused by an error in installation work or an improper installation place when a combustion device such as a water heater is actually installed in each household. The present invention relates to a combustion device that can notify

[0002]

2. Description of the Related Art Recent combustion equipment such as a gas water heater is often of a so-called forced air supply type. In an actual use condition, that is, in a normal operation mode, a combustion control circuit twists a faucet. After starting combustion in the combustion section by detecting the occurrence of water flow or the like, the fan is adapted to send an optimal amount of air corresponding to the amount of combustion at that time to the combustion section. Therefore, the fan motor that rotates the fan is variably controlled so as to have a rotation speed corresponding to the combustion amount,
And to keep the rotation speed determined at that time constant,
Feedback control is performed. However, recently, as a new feedback control method developed by the present applicant, in consideration of the drive current actually flowing to the fan motor in use, feedback control is performed so as to maintain the drive current value at each time. There is also a method.

[0003]

In any case, such feedback control of the fan motor assumes that the exhaust system is normal, that is, the load of the fan (the amount of air driven by the fan) is normal. It is done assuming that it is within the range. However, when installing the combustion equipment in the first place, the installation environment was set up to block the fixed exhaust port provided for the equipment, or irregular exhaust that connects and exhausts any appropriate exhaust pipe according to individual housing circumstances In the case of the mouth type, when there is an error in the construction of the exhaust pipe, the feedback control may be adversely affected.

[0004] For example, regardless of whether the exhaust port is a regular exhaust port or an irregular exhaust port, if the exhaust system including the exhaust port becomes clogged due to clogging or the like, the amount of air to be driven by the fan decreases (the load on the fan). Therefore, the rotation speed of the fan motor tends to increase with the same driving power as compared with the case where the exhaust system is normal. Therefore, the feedback control functions to keep this within a predetermined rotation speed fluctuation range,
Because it substantially reduces the fan motor speed,
In effect, a shortage of air supplied to the combustion section occurs. In other words, when the exhaust system tends to become blocked, the fan motor must rotate at a higher rotation speed to compensate for the shortage of supply air, but feedback control suppresses this. is there.
Insufficient air supply, of course, can lead to improper combustion and, in some cases, serious danger.

Conversely, if the exhaust system must be connected to an exhaust pipe having a predetermined cross-sectional area and a predetermined range of length, but this is not the case, the amount of air to be driven becomes too large (the load on the fan). May be too heavy). In this case,
The feedback control always gives a large drive power to the fan motor in order to increase the fan motor rotation speed which tends to decrease, resulting in wasteful power consumption,
If such an overload state continues for a long time, the fan motor may be burned.

On the other hand, the feedback control of the fan motor is indispensable for a properly constructed combustion apparatus in order to achieve optimal combustion in a normal operation mode, and cannot be omitted. If the feedback control is performed in view of the fan motor drive current described above, it is possible to effectively follow the exhaust system abnormality as described above to a considerable extent, compensate for the shortage of air, and conversely increase the amount. Although it has the function of reducing the amount of air that tends to become too much, it is of course undesirable that there is an abnormality in the exhaust system from the time of construction. Therefore, in the present invention, before being used at the stage when the installation of the water heater has been completed, it has a function capable of informing the construction abnormality of the exhaust system in the first place, and furthermore, regarding this abnormality detection, has practically various convenient functions. Combustion equipment was provided.

[0007]

In order to achieve the above object, according to the present invention, a fan motor for driving a fan is provided to stably supply an appropriate amount of air to a combustion section by a fan at each time. First, as a common component in each embodiment of the present invention described later, the following component is provided for a combustion device that performs feedback control of the following. (a) Test start signal generating means capable of selectively generating a test start signal. (b) When the test start signal is received, the operation enters the construction abnormality determination mode. Under this mode, the combustion unit is burned at a predetermined combustion amount, and the fan is controlled by the feedback control so as to maintain a predetermined rotation speed corresponding to the predetermined combustion amount. An exhaust system construction abnormality judging circuit that issues an alarm signal when a drive voltage applied to the fan motor deviates from a predetermined range when the motor is controlled. (c) An alarm notification device that receives the above alarm signal and issues an alarm that can be recognized by a person.

However, the exhaust system construction abnormality judging circuit of the above component (b) can be replaced with any one of the following components (d), (e) and (f). (d) When the test start signal is received, the construction abnormality determination mode is entered.In this mode, the combustion unit is burned at a predetermined combustion amount, and the fan is controlled by the feedback control so as to maintain a predetermined rotation speed corresponding to the predetermined combustion amount. An exhaust system construction abnormality judging circuit that issues an alarm signal when a drive current supplied to the fan motor deviates from a predetermined range when the motor is controlled. (e) When the test start signal is received, a construction abnormality determination mode is entered.In this mode, the combustion unit is burned at a predetermined combustion amount, and the fan is controlled by the feedback control so as to maintain a predetermined rotation speed corresponding to the predetermined combustion amount. An exhaust system construction abnormality judging circuit for issuing an alarm signal when a feedback correction amount required to keep the fan motor at a predetermined number of revolutions is out of a predetermined range when the motor is controlled. (f) When a test start signal is received, a construction abnormality determination mode is entered. In this mode, the combustion unit is burned with a predetermined combustion amount, while a predetermined amount corresponding to the predetermined combustion amount set in the feedback control of the fan motor. The feedback control is turned off while applying drive power to rotate the fan motor at the rotation speed to the fan motor, and an exhaust signal that issues an alarm signal when the actual rotation speed of the fan motor rotating in that state deviates from a predetermined range. System construction abnormality judgment circuit.

In addition to having such basic components, or as an improvement of a combustion apparatus having such basic components, the present invention provides: When a warning signal is not issued below, a pass notification signal is output and a construction pass notification device is operated; a combustion device characterized by the following features: (h) exhaust system construction When the abnormality determination circuit does not generate an alarm signal under the construction abnormality determination mode, the construction abnormality determination mode is terminated, and the combustion equipment is put into a normal operation mode; .

The notification device according to the above-mentioned configuration requirement (c) can be configured to include an audible sound generating device such as a buzzer that can be heard, recognized, and understood by a person. The construction passing notification device in the above configuration requirement (g) is also a notification device that issues a warning by making the warning issued when receiving an alarm signal and the passing notification issued when receiving the passing notification signal different from each other. And the same notification device. In addition, the above configuration requirements
The test start signal generating means of (a) includes, according to another and individually specific embodiments of the present invention, (a-1) a test switch incorporated in an exhaust system construction abnormality determination circuit, A circuit for generating a test start signal by manual operation of a switch; (a-2) a test switch having a test switch connected detachably to an exhaust system construction abnormality determination circuit via a test start signal transmission connector; (A-3) A modulation test start signal that has a transmission circuit and a test switch, and that is modulated on the radio frequency or light wave from the transmission circuit by manual operation of the test switch. A portable device that receives a modulation test start signal by a receiving circuit connected to the exhaust system construction abnormality judgment circuit and demodulates it to serve as a test start signal. (A-4) Automatically detects power-on and detects Power-on detecting circuit for generating a test start signal can be configured as either.

[0011]

FIG. 1 shows a schematic configuration of a preferred embodiment of a combustion apparatus with an exhaust system construction abnormality alarm according to the present invention. The application of the present invention is not limited as long as it is a forced air supply type combustion device using a fan, the type of fuel and the like are not limited, and it may be a water heater or a heating device, and is a combustion device for other purposes. However, in the illustrated case, a gas water heater is assumed. Further, the basic operation of the gas water heater, that is, the mode of the combustion and the hot water supply operation itself in the normal operation mode is not particularly changed in the present invention, and may be the same as a known existing one. For example, when water is generated by the user opening a faucet or the like (not shown), the water is detected by a water flow sensor or the like (not shown), and the burner 23 as a combustion unit is ignited by an ignition device (not shown).
The burner 23 is, of course, supplied with gas as fuel via a gas proportional valve 24. After the start of combustion, for example, according to required data such as a hot water supply temperature set by a user, the amount of combustion required at each time is determined. The fuel valve control circuit 15 controls the valve opening of the gas proportional valve 24 so that the supply gas amount matches the amount of supplied gas, whereby the water supplied from the water supply via the appropriately heated heat exchanger 26 is added. The water is heated, and the hot water is supplied at the temperature desired by the user. Actually, feedback control is also employed for this hot water supply temperature control, but since this is not directly related to the present invention, illustration and description are omitted.

Further, at the time of combustion in the burner 23, the fan motor feedback control circuit 11, which itself may be the same as that of a known existing combustion device, causes the burner 23 to supply an appropriate amount of air to the combustion amount at each time. The fan motor 25 for driving the fan is feedback-controlled in order to stably feed the fan. That is, the fan motor rotation speed range is, for example, about 3000 rpm to about 6000 rpm in a typical model.
Performs feedback control of the fan motor 25 so as to keep the rotation speed determined according to the current combustion amount within this range. Therefore, the rotation system including the fan motor 25 or the fan driven by the fan motor 25 is provided with a sensor (not shown) for capturing the actual rotation speed (actual rotation speed) Sa at that time. The actual rotation speed data Sa is input to the fan motor feedback control circuit 11. Also, in a typical model, the above-described fan motor rotation speed range of about 3000 rpm to about 6000 rpm can be obtained by varying the drive voltage Vf applied to the fan motor 25 between 20V and 40V.

FIG. 4 shows an example of such a relationship between the drive voltage and the fan rotation speed. However, in this case, a range of approximately ± 200 rpm is set as a normal range Δ with respect to the currently set rotation speed. Is shown.

[0014] However, this type of combustion equipment has its main components, such as a combustion section, housed in an appropriate housing.
In the machine wall 22 of the housing, a fixed exhaust port 21 having a fixed opening position and opening area is provided, or a predetermined outlet is provided so as to be able to respond flexibly to each of the houses where the water heater is installed. An exhaust pipe (irregular exhaust port 21 ') allowed to reach a predetermined length range in the cross-sectional area range is connected.

However, in the case of the type using the standard exhaust port 21 as it is, the construction is not satisfactory, and
It is conceivable that some or all of 21 will be blocked or close to this. In addition, when the irregular exhaust port 21 'is used, similarly, the construction may not be closed, and even though the exhaust pipe to be connected is not connected well, the installer may not notice this. In such a case, if the construction is completed and used by the user, a problem occurs in the control of the fan.

FIG. 3 shows an experimental result by the present inventor for explaining this point. That is, when the fan motor 25 was feedback-controlled by the fan motor feedback control circuit 11 so as to keep the fan rotation speed constant at 4000 rpm in a specific gas water heater, and when the exhaust system was properly constructed, FIG. As shown in (A), the drive voltage Vf applied to the fan motor had a center value of 27 V, and a range of ± 2 V could be regarded as a normal range ΔV. However, if the exhaust pipe is clogged intentionally, the lightly loaded fan motor (which has reduced the amount of air driven by the fan) will try to run at a higher speed, suppress it, and maintain a constant speed of 4000 rpm Motor drive voltage output by feedback control circuit 11
Vf decreases to 20V, and conversely, if the exhaust pipe is removed and the load on the fan is intentionally increased, the speed of the fan motor, which tends to decrease, is increased, and the feedback control circuit 11 is maintained to maintain the constant speed of 4000rpm. Output the fan motor drive voltage Vf to 33V.

Next, when the above situation was observed by the current flowing through the fan motor, it becomes as shown in FIG. 3 (B). Under a normal construction state of the exhaust system, the fan motor drive current If was 0.80.
A was 0.72A to 0.86A, which could be regarded as the normal range ΔI.
As a result, the fan motor drive current If is feedback-controlled to keep 0.58A, while 1.12A when the exhaust pipe is not connected.
It became.

Further, in order to see how much the feedback control circuit 11 performs the feedback correction in terms of the number of rotations of the fan, the feedback control was removed. When the exhaust pipe was closed, the number of rotations of the fan reached 5000 rpm. It increased to 3200 rpm when the exhaust pipe was not connected. In other words,
While the feedback correction amount in the normal rotation speed range Δ is ± 200 rpm as described above, when an abnormal construction called exhaust pipe blockage is performed, the feedback control circuit 11 Feedback correction, +800 rpm for abnormal construction equivalent to exhaust pipe disconnection
It turned out that considerable feedback correction was performed. The change in the number of revolutions during abnormal construction with the feedback control removed is based on the voltage applied to the fan motor.
In the variable range of Vf from 20 V to 40 V, it is shown in FIG. In the drawing, the upper one is that when the exhaust pipe is closed, and the lower one is that when the exhaust pipe is not connected.

Based on such knowledge, in the embodiment of the present invention shown in FIG. 1, an exhaust system construction abnormality judging circuit 12 which operates according to the flowchart shown in FIG.
Further, a notifying device 14 for notifying the result is provided.
In this embodiment, the notification device 14 also includes a warning notification device 16 that warns of a construction abnormality in the exhaust system, and a construction pass notification device 17 that reports the result of determining that normal construction is being performed. Further, many of the recent water heaters use a microcomputer as a combustion control circuit, and the fan motor feedback control circuit 11 and the fuel valve control circuit shown in FIG.
15, further including various arithmetic circuits (not shown), etc., are realized in software by the microcomputer, but the exhaust system construction abnormality determination circuit 12, which executes the operation of the present invention described below, also includes such a microcomputer. Can be equivalently realized.

The operation performed by the exhaust system construction abnormality judging circuit (hereinafter simply referred to as a judging circuit) 12 will be described in the following order. The installer who has installed the gas water heater has to install the gas water heater at an appropriate position. Push button type, slide type, etc.
The test switch 13 of an appropriate operation type is operated. Thereby, the test start signal Sd is given to the determination circuit 12,
Thereafter, the operation enters the construction abnormality determination mode shown in step 31 in the flowchart of FIG. However, test switch 13
Is not limited to an electric switch that is substantially incorporated in the determination circuit 12 and receives a manual operation as described above, but as shown by a virtual line in FIG. 1, the determination circuit is connected via a test start signal transmission connector 18. Portable device detachably connected to 12
19 may be provided. That is, the installer connects the portable device 19 (for example, an electronic organizer or a portable personal computer or the like) via the connector 18 after the installation, and a specific switch or key attached thereto as the test switch 13. The test start signal is transmitted from the portable device 19 by manual operation or by manually operating a plurality of switches (keys) as test switches 13 in a predetermined manner.
Sd may be generated and transmitted to the determination circuit 12 via the connector 18. In addition, as described in the portable device 20 also indicated by a virtual line, the above-described wired transmission can be replaced with wireless transmission or optical transmission.
That is, the transmission circuit Tx and the test switch
13 is provided, and a modulation test start signal Sd ′ modulated by being placed on a radio frequency or a light wave (such as an infrared ray) is transmitted from the transmission circuit Tx by a manual operation of the test switch 13, while the combustion device is A receiving circuit Rx connected to the determination circuit 12 is provided, and the receiving circuit Rx controls the modulation test start signal S
d 'is received and demodulated, and the judgment circuit 1 is used as a test start signal Sd.
2 can be given. In FIG. 1, a power-on detection circuit 27 is also provided as shown by the imaginary line. The power-on detection circuit 27 may detect that the power is turned on, and automatically generate the test start signal Sd.

In any case, upon receiving the test start signal Sd, the determination circuit 12 which has entered the construction abnormality determination mode shown in step 31 in FIG. It is determined whether the construction completion flag has already been set. The construction completion flag assumed in this embodiment is a volatile memory area (RAM: not shown) attached to a microcomputer that substantially constitutes the determination circuit 12 when it is determined that the construction has been performed normally. ) Is selectively set at a predetermined position, and if this flag is already set, it means that there is a history determined to be normal construction by the determination operation described later, so as shown in step 40, The illustrated gas water heater is left under the control in the normal operation mode (that is, in a state where the use is permitted by the user), and the construction abnormality determination mode is ended.

However, when the test start signal Sd is issued at the stage when the construction is temporarily completed, it is determined in the determination step 32 that the construction completion flag is not set.
The determination circuit 12 proceeds to the next step 33, operates an ignition device (not shown) to ignite the burner 23, and then works on the existing fuel valve control circuit 15 and the fan motor feedback control circuit 11 to determine in advance in the design stage. The burner 23 is controlled so that the combustion with the predetermined combustion amount is generated in the burner 23. At this time, the predetermined combustion amount can be arbitrarily set, but for example, is simply set to a minimum combustion amount or a maximum combustion amount. With this configuration, the fan motor 25 is also feedback-controlled by the fan motor feedback control circuit 11 so as to satisfy a predetermined fan rotation speed set as appropriate at the time of the predetermined combustion amount. It can be determined at the design stage.

When the combustion at the predetermined combustion amount is stabilized (that is, after the predetermined time has elapsed), the determination circuit 12 proceeds to step 34, and the parameter of interest regarding the drive of the fan motor 25 that is being feedback-controlled is within the normal range. It is determined whether or not. As the parameters of interest here, as is apparent from the knowledge already described with reference to FIGS. 3 and 4, the drive voltage Vf, the drive current If of the fan motor 25, and the fan motor feedback control circuit 11 keep the predetermined rotation speed. Any of the feedback correction amounts ( or the feedback correction amounts in terms of the number of rotations ) relating to the fan motor drive voltage or drive current used for this purpose can be selected.

For the sake of explanation, for example, if attention is paid to the drive voltage Vf, if the construction of the exhaust system is normally performed, the drive to the fan motor 25 during the test combustion at the above-mentioned predetermined combustion amount is performed. The voltage Vf also takes a value within the normal range Δ in FIG. 4. However, when the exhaust pipe is in a closed state, or when the exhaust pipe to be connected is not connected, the drive voltage Vf is out of the normal range. Come off. For example, when the predetermined combustion amount set during the test combustion performed here is an appropriate combustion amount for rotating the fan motor 25 at 4000 rpm, as shown in FIG. , The voltage range ΔV from 25V to 29V as the normal range,
It can be determined that the case deviated from this is abnormal construction of the exhaust system, and the case other than that is normal construction.

Similarly, when the parameter of interest is the fan motor drive current If, as described with reference to FIG. 3B, for example, the predetermined combustion amount during the test combustion is assumed to be equal to the fan motor speed of 4000 rpm. If it is set appropriately, the normal current value range from 0.72A to 0.86A is ΔI,
It can be determined that the case deviated from this is abnormal construction of the exhaust system, and the case other than that is normal construction.

Further, if the parameter of interest is a feedback correction amount (voltage or current) used when the fan motor feedback control circuit 11 performs feedback control, or its rotational speed converted value, FIGS. 3 (C) and 4 (C). As described above, ± 20 in fan motor speed conversion
If the feedback control is performed within the range of 0 rpm, it is determined that the operation is normal, but if the feedback control is exceeded, it can be determined that the construction is abnormal.

On the other hand, at the time of the test combustion performed here, the operation of the fan motor feedback control circuit 11 is invalidated and the feedback control is turned off, so that it is possible to determine whether the exhaust system construction is abnormal or normal. For example, the predetermined combustion amount during the test combustion is set to 4000 fan motor rotation
When the combustion rate is set to be the rpm and the normal construction is performed, the actual rotation speed Sa of the fan motor 25 or the fan at that time can be performed without applying feedback control.
(FIG. 1) should fall within the range of ± 200 rpm as shown in FIG. 3 (C). However, when the exhaust pipe is clogged or forgotten to be connected, the actual rotation speed Sa of the fan motor or the fan greatly deviates from the desired rotation speed of 4000 rpm, as shown in FIG. 3 (C). . Therefore, the actual rotation speed Sa obtained from the fan motor 25 or the fan is detected, and whether or not this deviates from the predetermined range ± 200 rpm is detected. Can be determined as normal construction.

In any case, it is determined in step 34 whether or not the above noted parameter is within the normal range. If not, the process proceeds to step 35 to stop the test combustion. After that, in step 36, the construction failure alarm signal is output from the determination circuit 12, and the alarm notifying device 16 in the notifying device 14 shown in FIG. 1 is operated. The alarm notification device 16 may be any device that emits an alarm (preferably an audible sound) that can be recognized and understood by a person. For example, a simple buzzer may be used. The sound may be long and small and beeping for a long time.

When the alarm issuance has been completed in this way, the operation of the construction abnormality judging mode is ended in the judging circuit 12, whereby the constructor can confirm that there is some abnormality in the construction of the exhaust system. You can know.

On the other hand, when the parameter of interest is within the normal range in the determination step 34 of the parameter of interest, the determination circuit 12 proceeds to step 37 and sets the execution completion flag at a predetermined position in the memory area described above. After that, a construction pass notification signal is output to the construction pass notification device 17 in the notification device 14 to notify the construction pass. The pass notification at this time may be arbitrary including a visible display such as once lighting of a lamp, but if an audible sound display is adopted, a form different from the warning notification sound form indicating a construction failure, for example, a small "pip" , A buzzer ”and end it. However, when the pass notification is also displayed as an audible sound, the construction pass notification device 17 may be substantially the same device as the above-described alarm notification device 16, for example, a buzzer. In any case, if the pass notification is given, the determination circuit 12 stops the test combustion as shown in step 39, and ends the execution abnormality determination mode.
However, the passing notification may be made after the combustion is stopped.

In the step of determining whether or not the parameter of interest described above is within the normal range, an operation is performed in which the actual rotation speed Sa of the fan or fan motor is used as the parameter of interest and feedback control is intentionally turned off. Also, after the present construction abnormality determination mode is ended and the control circuit provided in the device is shifted to the normal combustion control, the feedback control of the fan motor 25 is naturally enabled. Further, according to the series of actions described above, after once determining the construction abnormality of the exhaust system, if the test switch 13 is operated again, if there is an abnormality in the exhaust system, the steps described above. Eventually, this will lead to the reissue of the alarm, and conversely, if normal construction has already been performed, the construction completion flag has already been set in the previous test, so the process moves from step 32 to step 40, and Then, the operation of the test switch 13 is ignored, and the operation can be shifted to the normal operation mode. Of course, the installer who heard the alarm performs a re-inspection and re-installation, and then operates the test switch 13 again or, if the power-on detection circuit 27 is provided, disconnects the power plug once and re-installs. If you plug in again after
It is possible to know whether or not the rebuilding was appropriate. If so, a pass notification is issued and the equipment can be used. Otherwise, an alarm is issued again.

[0032]

According to the present invention, in a forced air supply type combustion device using a fan, it is possible to inform a contractor whether or not the exhaust system has been properly constructed at the time of completion of the construction. In the case of poor construction, it is possible to oblige the installer to re-examine, and also to perform re-examination afterwards, so that the user can use the equipment with peace of mind.

[Brief description of the drawings]

FIG. 1 is a schematic circuit configuration diagram of one embodiment of a combustion apparatus with an exhaust system construction abnormality alarm configured according to the present invention.

FIG. 2 is a flowchart related to the operation of a construction abnormality determination circuit in the combustion equipment shown in FIG.

FIG. 3 is an explanatory diagram for explaining the relationship between each parameter relating to fan motor drive and the rotation speed when the fan or the fan motor is rotating within a normal rotation speed range and when the rotation is not so.

FIG. 4 is an explanatory diagram illustrating an example of a relationship between a change in drive voltage applied to a fan motor and a fan rotation speed.

[Explanation of symbols]

 11 Fan motor feedback control circuit, 12 Exhaust system construction abnormality judgment circuit, 13 Test switch, 14 Notification device, 15 Fuel valve control circuit, 16 Construction abnormality alarm device in the notification device, 17 Construction pass notification device in the notification device, 18 Detachable connector for transmission of test start signal, 19 Portable equipment with test switch, 20 Portable equipment with transmission circuit and test switch, 21 Standard exhaust, 21 'irregular exhaust, 23 Burner or combustion part, 25 Fan motor, 27 power-on detection circuit, Sd test start signal, Sd 'modulation test start signal Tx transmission circuit, Rx reception circuit.

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-63-189712 (JP, A) JP-A-5-196229 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) F23N 5/24

Claims (7)

(57) [Claims] 1. A combustion apparatus for feedback-controlling a fan motor for driving a fan in order to stably supply an appropriate amount of air to a combustion section by a fan for a current combustion amount; Test start signal generating means capable of generating a start signal; receiving the test start signal, enters a construction abnormality determination mode;
In the mode, when the combustion unit is burned at a predetermined combustion amount and the fan motor is controlled by the feedback control so as to maintain a predetermined rotation speed corresponding to the predetermined combustion amount, (1) applied to the fan motor (2) When the drive current supplied to the fan motor deviates from the predetermined range, (3) When the feedback correction amount required for the feedback control deviates from the predetermined range, (4) The feedback control is turned off while applying drive power to rotate the fan motor at a predetermined rotation speed corresponding to the predetermined combustion amount to the fan motor, and the actual rotation speed of the fan motor rotating in that state. An exhaust system construction abnormality judging circuit for issuing an alarm signal when at least one of the following is deviated from a predetermined range; An alarm notification device that issues an alarm; a construction that receives a pass notification signal output by the exhaust system construction abnormality determination circuit when the exhaust system construction abnormality determination circuit does not generate the alarm signal, and performs a pass notification. And a passing notification device. 2. The combustion equipment according to claim 1, wherein the construction passing notification device is the same notification device as the warning notification device, but an alarm that is issued when the warning signal is received and the passing notification signal. And a pass notification that is issued in the case of receiving the notification. 3. A combustion device for feedback-controlling a fan motor for driving the fan in order to stably supply an appropriate amount of air to the combustion portion by a fan for a current combustion amount; Test start signal generating means capable of generating a start signal; receiving the test start signal, enters a construction abnormality determination mode;
In the mode, when the combustion unit is burned at a predetermined combustion amount and the fan motor is controlled by the feedback control so as to maintain a predetermined rotation speed corresponding to the predetermined combustion amount, (1) applied to the fan motor (2) When the drive current supplied to the fan motor deviates from the predetermined range, (3) When the feedback correction amount required for the feedback control deviates from the predetermined range, (4) The feedback control is turned off while applying drive power to rotate the fan motor at a predetermined rotation speed corresponding to the predetermined combustion amount to the fan motor, and the actual rotation speed of the fan motor rotating in that state. An exhaust system construction abnormality judging circuit for issuing an alarm signal when at least one of the following is deviated from a predetermined range; The exhaust system construction abnormality determination circuit terminates the construction abnormality determination mode when the warning signal is not issued in the construction abnormality determination mode, and A combustion device with an exhaust system construction abnormality alarm, wherein the device is put into a normal operation mode. 4. A combustion apparatus for feedback-controlling a fan motor for driving a fan in order to stably supply an appropriate amount of air to a combustion section by a fan for a current combustion amount; Test start signal generating means capable of generating a start signal; receiving the test start signal, enters a construction abnormality determination mode;
In the mode, when the combustion unit is burned at a predetermined combustion amount and the fan motor is controlled by the feedback control so as to maintain a predetermined rotation speed corresponding to the predetermined combustion amount, (1) applied to the fan motor (2) When the drive current supplied to the fan motor deviates from the predetermined range, (3) When the feedback correction amount required for the feedback control deviates from the predetermined range, (4) The feedback control is turned off while applying drive power to rotate the fan motor at a predetermined rotation speed corresponding to the predetermined combustion amount to the fan motor, and the actual rotation speed of the fan motor rotating in that state. An exhaust system construction abnormality judging circuit for issuing an alarm signal when at least one of the following is deviated from a predetermined range; The test start signal generating means includes a test switch incorporated in the exhaust system construction abnormality determination circuit, and generates the test start signal by manual operation of the test switch. A combustion device having an exhaust system construction abnormality alarm. 5. A combustion apparatus for feedback-controlling a fan motor for driving a fan in order to stably supply an appropriate amount of air to a combustion section by a fan at each time; Test start signal generating means capable of generating a start signal; receiving the test start signal, enters a construction abnormality determination mode;
In the mode, when the combustion unit is burned at a predetermined combustion amount and the fan motor is controlled by the feedback control so as to maintain a predetermined rotation speed corresponding to the predetermined combustion amount, (1) applied to the fan motor (2) When the drive current supplied to the fan motor deviates from the predetermined range, (3) When the feedback correction amount required for the feedback control deviates from the predetermined range, (4) The feedback control is turned off while applying drive power to rotate the fan motor at a predetermined rotation speed corresponding to the predetermined combustion amount to the fan motor, and the actual rotation speed of the fan motor rotating in that state. An exhaust system construction abnormality judging circuit for issuing an alarm signal when at least one of the following is deviated from a predetermined range; The test start signal generating means is detachably connected to the exhaust system construction abnormality determination circuit via a test start signal transmission connector, and has a test switch; A combustion device that emits the test start signal by manual operation of the test switch; 6. A combustion apparatus for feedback-controlling a fan motor for driving a fan in order to stably supply an appropriate amount of air to a combustion section by a fan for an amount of combustion at each time; Test start signal generating means capable of generating a start signal; receiving the test start signal, enters a construction abnormality determination mode;
In the mode, when the combustion unit is burned at a predetermined combustion amount and the fan motor is controlled by the feedback control so as to maintain a predetermined rotation speed corresponding to the predetermined combustion amount, (1) applied to the fan motor (2) When the drive current supplied to the fan motor deviates from the predetermined range, (3) When the feedback correction amount required for the feedback control deviates from the predetermined range, (4) The feedback control is turned off while applying drive power to rotate the fan motor at a predetermined rotation speed corresponding to the predetermined combustion amount to the fan motor, and the actual rotation speed of the fan motor rotating in that state. An exhaust system construction abnormality judging circuit for issuing an alarm signal when at least one of the following is deviated from a predetermined range; The test start signal generating means has a transmission circuit and a test switch, and is modulated by being put on a radio frequency or a light wave from the transmission circuit by manual operation of the test switch. A portable device that transmits a test start signal and receives and demodulates the modulation test start signal by a receiving circuit connected to the exhaust system construction abnormality determination circuit to make the test start signal; Combustion equipment with abnormal alarm. 7. A combustion apparatus for feedback-controlling a fan motor for driving a fan in order to stably supply an appropriate amount of air to a combustion section by a fan for an amount of combustion at each time; Test start signal generating means capable of generating a start signal; receiving the test start signal, enters a construction abnormality determination mode;
In the mode, when the combustion unit is burned at a predetermined combustion amount and the fan motor is controlled by the feedback control so as to maintain a predetermined rotation speed corresponding to the predetermined combustion amount, (1) applied to the fan motor (2) When the drive current supplied to the fan motor deviates from the predetermined range, (3) When the feedback correction amount required for the feedback control deviates from the predetermined range, (4) The feedback control is turned off while applying drive power to rotate the fan motor at a predetermined rotation speed corresponding to the predetermined combustion amount to the fan motor, and the actual rotation speed of the fan motor rotating in that state. An exhaust system construction abnormality judging circuit for issuing an alarm signal when at least one of the following is deviated from a predetermined range; And an alarm notifying device for issuing an alarm. The test start signal generating means has a power-on detection circuit for detecting power-on and automatically generating the test start signal. Combustion equipment with system construction abnormality alarm.